#define  _CRT_SECURE_NO_WARNINGS 1
#include<stdio.h>
#include<assert.h>
char* sim_strcpy(char* destination, const char* source)
{
	char* ret = destination;
	assert(destination && source);
	while (*destination++ = *source++)
	{
		;
	}
	return ret;
}

//int main()
//{
//	char ch1[20] = {0};
//	char ch2[] = "xxxxxx";
//	printf("%s", sim_strcpy(ch1, ch2));
//	return 0;
//}